The MOS Technology 8364 also known as Paula is a chip which includes logic for audio playback, floppy disk drive control and serial port input/output. It was used in all models of the Commodore Amiga, the Commodore CDTV and the Amiga CD32.
A 8364 contains the following elements:
- Digital to Analog converters: four 8-bit DMA-driven audio channels grouped into a left and right audio output. Each of the channels have independent frequency and a 6-bit volume control.
- Disk control: a disk controller to read/write data from/to a floppy disk.
- UART control: a serial port controller to read/write data from/to a serial port.
- Pot control: four general purpose I/O ports with counters for Analog to Digital conversion which can be used for reading out analog joysticks.
- Interrupt control: handles internal and external interrupts
- DMA request logic: requests DMA cycles from the system DMA controller for the audio and disk controllers
- en.wikipedia.org/wiki/Paula_(computer_chip) - Wikipedia